Pulscon LTC57 PROFIBUS PA
Important document information
2015
-0
3
7
1.2.2
Electrical symbols
1.2.3
Tool symbols
Symbol
Meaning
Direct current
A terminal to which DC voltage is applied or through which direct
current flows.
Alternating current
A terminal to which alternating voltage is applied or through which
alternating current flows.
Direct current and alternating current
• A terminal to which alternating voltage or DC voltage is applied.
• A terminal through which alternating current or direct current
flows.
Ground connection
A grounded terminal which, as far as the operator is concerned, is
grounded via a grounding system.
Protective ground connection
A terminal which must be connected to ground prior to establishing
any other connections.
Equipotential connection
A connection that has to be connected to the plant grounding
system: This may be a potential equalization line or a star grounding
system depending on national or company codes of practice.
Table 1.1
)
*
Symbol
Meaning
Torx screwdriver
Flat blade screwdriver
Cross-head screwdriver
Allen key
Hexagon wrench
Table 1.2